$10 off $50 TNT Fireworks Coupon June 24, 2010 This post may contain a link to an affiliate. See my disclosure policy for more information. TNT is offering a coupon for $10 off $50 TNT Fireworks for the 4th of July! Simply fill out this form and a coupon will be emailed to you. This coupon is usable at any TNT tent or station or at select supercenters. Thanks, Southern Savers!